349 lines
13 KiB
C
349 lines
13 KiB
C
//
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// Created by nicol on 2018-03-18.
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//
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#include <mem.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <winsock2.h>
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#include "esc.h"
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#include "socket.h"
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#include "uuid.h"
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#include "ClientMessageDtos.pb-c.h"
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struct st_buffer {
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uint32_t size;
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uint8_t* data;
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};
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typedef struct st_buffer buffer_t;
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const buffer_t buffer_create(uint32_t size) {
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buffer_t buf = {size, malloc(size)};
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return buf;
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}
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const buffer_t buffer_from(uint8_t* data, uint32_t size) {
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buffer_t buf = {size, data};
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return buf;
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}
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void buffer_free(buffer_t buffer) {
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free(buffer.data);
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}
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struct st_tcp_package {
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uint8_t command;
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uint8_t flags;
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esc_uuid_t correlation_id;
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const char* login;
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const char* password;
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buffer_t data;
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};
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typedef struct st_tcp_package tcp_package_t;
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const uint32_t CommandOffset = 0;
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const uint32_t FlagsOffset = 1;
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const uint32_t CorrelationOffset = 2;
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const uint32_t AuthOffset = 18;
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const uint32_t MandatorySize = 18;
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const tcp_package_t* tcp_package_create(uint8_t command, const esc_uuid_t* correlation_id, buffer_t data) {
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tcp_package_t* pkg = malloc(sizeof(tcp_package_t));
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pkg->command = command;
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pkg->flags = 0;
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pkg->correlation_id = *correlation_id;
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pkg->login = 0;
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pkg->password = 0;
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pkg->data = data;
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return pkg;
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}
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const tcp_package_t* tcp_package_create_authenticated(uint8_t command, const esc_uuid_t* correlation_id, buffer_t data, const char* username, const char* password) {
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tcp_package_t* pkg = malloc(sizeof(tcp_package_t));
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pkg->command = command;
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pkg->flags = 1;
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pkg->correlation_id = *correlation_id;
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pkg->login = username;
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pkg->password = password;
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pkg->data = data;
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return pkg;
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}
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void tcp_package_free(const tcp_package_t* pkg) {
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buffer_free(pkg->data);
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free((void*)pkg);
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}
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buffer_t tcp_package_to_buffer(const tcp_package_t* pkg) {
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uint8_t* _dst = malloc(MandatorySize + pkg->data.size + (pkg->flags ? 257*2 : 0));
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_dst[CommandOffset] = pkg->command;
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_dst[FlagsOffset] = pkg->flags;
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memcpy(&_dst[CorrelationOffset], &pkg->correlation_id, sizeof(esc_uuid_t));
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size_t size = MandatorySize;
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if (pkg->flags) {
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size_t l_len = strlen(pkg->login);
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_dst[AuthOffset] = l_len;
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strcpy(&_dst[AuthOffset+1], pkg->login);
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size_t p_len = strlen(pkg->password);
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_dst[AuthOffset+1+l_len] = p_len;
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strcpy(&_dst[AuthOffset+2+l_len], pkg->password);
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memcpy(&_dst[AuthOffset+2+l_len+p_len], pkg->data.data, pkg->data.size);
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size += 2 + l_len + p_len + pkg->data.size;
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} else {
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memcpy(&_dst[AuthOffset], pkg->data.data, pkg->data.size);
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size += pkg->data.size;
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}
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return buffer_from(_dst, size);
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}
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const tcp_package_t* tcp_package_from_buffer(buffer_t buffer) {
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tcp_package_t* pkg = malloc(sizeof(tcp_package_t));
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pkg->command = buffer.data[CommandOffset];
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pkg->flags = buffer.data[FlagsOffset];
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memcpy(&pkg->correlation_id, &buffer.data[CorrelationOffset], sizeof(esc_uuid_t));
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if (pkg->flags) {
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size_t l_len = buffer.data[AuthOffset];
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size_t p_len = buffer.data[AuthOffset+1+l_len];
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pkg->data = buffer_create(buffer.size - MandatorySize - 2 - l_len - p_len);
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memcpy(pkg->data.data, &buffer.data[MandatorySize + 2 + l_len + p_len], buffer.size - MandatorySize - 2 - l_len - p_len);
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} else {
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pkg->login = 0;
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pkg->password = 0;
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pkg->data = buffer_create(buffer.size - MandatorySize);
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memcpy(pkg->data.data, &buffer.data[MandatorySize], buffer.size - MandatorySize);
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}
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return pkg;
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}
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struct st_connection_settings {
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unsigned char use_ssl_connection;
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};
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const esc_connection_settings_t default_connection_settings = {
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};
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const esc_connection_settings_t* esc_default_connection_settings = &default_connection_settings;
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struct st_tcp_endpoint {
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char* host;
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unsigned short port;
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};
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typedef struct st_tcp_endpoint tcp_endpoint_t;
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struct st_node_endpoints {
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tcp_endpoint_t tcp_endpoint;
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tcp_endpoint_t secure_tcp_endpoint;
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};
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typedef struct st_node_endpoints node_endpoints_t;
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typedef const node_endpoints_t* (*endpoint_discoverer_t)(const void* discover_data, const tcp_endpoint_t* failed_tcp_endpoint);
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struct st_connection {
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esc_connection_settings_t settings;
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void* discoverer_data;
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endpoint_discoverer_t discover;
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socket_t tcp_conn;
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ProtobufCAllocator protobuf_c_allocator;
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};
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struct st_static_endpoint_discoverer {
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tcp_endpoint_t tcp_endpoint;
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unsigned char use_ssl_connection;
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};
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typedef struct st_static_endpoint_discoverer static_endpoint_discoverer_t;
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const node_endpoints_t* static_discover(const static_endpoint_discoverer_t* discover_data, const tcp_endpoint_t* failed_tcp_endpoint) {
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node_endpoints_t* result = malloc(sizeof(node_endpoints_t));
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if (discover_data->use_ssl_connection) {
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result->secure_tcp_endpoint = discover_data->tcp_endpoint;
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} else {
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result->tcp_endpoint = discover_data->tcp_endpoint;
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}
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return result;
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}
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int connection_send_tcp_package(const esc_connection_t* conn, const tcp_package_t* pkg) {
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char uuid_buf[37];
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printf("connection_send_tcp_package: %u %u %s %u\n", pkg->command, pkg->flags, esc_uuid_format(&pkg->correlation_id, uuid_buf, 37), pkg->data.size);
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buffer_t send_buffer = tcp_package_to_buffer(pkg);
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if (socket_send(conn->tcp_conn, (char *) &send_buffer.size, sizeof(uint32_t)) <= 0) {
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buffer_free(send_buffer);
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return -1;
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}
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if (socket_send(conn->tcp_conn, (char *) send_buffer.data, send_buffer.size) <= 0) {
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buffer_free(send_buffer);
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return -2;
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}
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buffer_free(send_buffer);
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return 0;
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}
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const tcp_package_t* connection_recv_tcp_package(const esc_connection_t* conn) {
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uint32_t recv_size;
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int rc;
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if ((rc = socket_recv(conn->tcp_conn, (char *)&recv_size, sizeof(uint32_t))) != 4) {
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printf("%d %d", rc, socket_error());
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return 0;
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}
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buffer_t recv_buffer = buffer_create(recv_size);
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while(recv_size > 0) {
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int pos = recv_buffer.size - recv_size;
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rc = socket_recv(conn->tcp_conn, (char *)&recv_buffer.data[pos], recv_size);
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recv_size -= rc;
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}
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const tcp_package_t* recv_pkg = tcp_package_from_buffer(recv_buffer);
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buffer_free(recv_buffer);
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char uuid_buf[37];
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printf("connection_recv_tcp_package: %u %u %s %u\n", recv_pkg->command, recv_pkg->flags, esc_uuid_format(&recv_pkg->correlation_id, uuid_buf, 37), recv_pkg->data.size);
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//for (int32_t i=0;i<recv_pkg->data.size;i++) {
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// printf("%x (%c) ", recv_pkg->data.data[i], recv_pkg->data.data[i]);
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//}
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//printf("\n");
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return recv_pkg;
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}
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void* protobuf_c_alloc(void *alloc_data, size_t size) {
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return malloc(size);
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}
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void protobuf_c_free(void *alloc_data, void* p) {
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free(p);
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}
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const esc_connection_t* esc_connection_create(const esc_connection_settings_t* connection_settings, const char* addr, const char* connection_name) {
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if (strncmp(addr, "tcp://", 6) != 0) {
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return 0;
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}
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char* pos = strrchr(addr, ':');
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if (pos == 0) {
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return 0;
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}
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char* host = malloc(pos - addr - 5);
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strncpy(host, addr+6, pos-addr-6);
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host[pos-addr-6] = 0;
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unsigned short port = (unsigned short)atoi(pos+1);
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static_endpoint_discoverer_t discover_data = {
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{host, port}, connection_settings->use_ssl_connection
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};
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struct st_connection* conn = malloc(sizeof(struct st_connection));
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conn->settings = *connection_settings;
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conn->discoverer_data = malloc(sizeof(static_endpoint_discoverer_t));
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memcpy(conn->discoverer_data, &discover_data, sizeof(static_endpoint_discoverer_t));
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conn->discover = (endpoint_discoverer_t)static_discover;
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conn->protobuf_c_allocator.alloc = protobuf_c_alloc;
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conn->protobuf_c_allocator.free = protobuf_c_free;
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conn->protobuf_c_allocator.allocator_data = 0;
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return conn;
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}
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// return 0 on success
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// return non-zero on failure and sets last_error on connection
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int esc_connection_connect(const esc_connection_t* conn) {
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// Discover endpoint
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const node_endpoints_t* endpoints = conn->discover(conn->discoverer_data, 0);
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if (endpoints == 0) {
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return -1;
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}
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// Establish Tcp Connection
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esc_connection_t* _conn = (esc_connection_t*)conn;
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_conn->tcp_conn = socket_create(SOCKET_TYPE_TCP);
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tcp_endpoint_t endpoint = conn->settings.use_ssl_connection ? endpoints->secure_tcp_endpoint : endpoints->tcp_endpoint;
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if (socket_connect(conn->tcp_conn, endpoint.host, endpoint.port) != 0) {
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return -2;
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}
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// Identify
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// build message
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EventStore__Client__Messages__IdentifyClient identify_client;
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event_store__client__messages__identify_client__init(&identify_client);
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identify_client.connection_name = "abc123";
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identify_client.version = 1;
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size_t s = event_store__client__messages__identify_client__get_packed_size(&identify_client);
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uint8_t buffer[s];
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event_store__client__messages__identify_client__pack(&identify_client, buffer);
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// build tcp_package
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const tcp_package_t* send_pkg = tcp_package_create(0xF5, esc_uuid_create(), buffer_from(buffer, s));
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if (connection_send_tcp_package(conn, send_pkg) != 0) {
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return -3;
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}
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const tcp_package_t* recv_pkg = connection_recv_tcp_package(conn);
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if (recv_pkg == 0) {
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return -4;
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}
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if (recv_pkg->command != 0xF6) {
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return -5;
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}
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return 0;
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}
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const esc_credentials_t* esc_credentials_create(const char* username, const char* password) {
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esc_credentials_t* creds = malloc(sizeof(struct st_credentials));
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creds->username = username;
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creds->password = password;
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return creds;
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}
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const esc_recorded_event_t* recorded_event_create(EventStore__Client__Messages__EventRecord* msg) {
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if (msg == 0) return 0;
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esc_recorded_event_t* ev = malloc(sizeof(esc_recorded_event_t));
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ev->event_id = esc_uuid_from(msg->event_id.data, msg->event_id.len);
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return ev;
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}
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esc_resolved_event_t* resolved_event_create(EventStore__Client__Messages__ResolvedEvent* msg) {
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esc_resolved_event_t* ev = malloc(sizeof(esc_resolved_event_t));
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ev->original_position.prepare_position = msg->prepare_position;
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ev->original_position.commit_position = msg->commit_position;
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ev->event = recorded_event_create(msg->event);
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ev->link = recorded_event_create(msg->link);
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return ev;
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}
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const esc_all_events_slice_t* esc_connection_read_all_forward(const esc_connection_t* conn, const esc_position_t* last_checkpoint, unsigned int count, const esc_credentials_t* credentials) {
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EventStore__Client__Messages__ReadAllEvents send_msg;
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event_store__client__messages__read_all_events__init(&send_msg);
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send_msg.prepare_position = last_checkpoint ? last_checkpoint->prepare_position : 0;
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send_msg.commit_position = last_checkpoint ? last_checkpoint->commit_position : 0;
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send_msg.max_count = count;
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send_msg.require_master = 0;
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send_msg.resolve_link_tos = 0;
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size_t s = event_store__client__messages__read_all_events__get_packed_size(&send_msg);
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uint8_t buffer[s];
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event_store__client__messages__read_all_events__pack(&send_msg, buffer);
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const tcp_package_t* send_pkg = tcp_package_create_authenticated(0xB6, esc_uuid_create(), buffer_from(buffer, s), credentials->username, credentials->password);
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if (connection_send_tcp_package(conn, send_pkg) != 0) {
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return 0;
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}
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const tcp_package_t* recv_pkg = connection_recv_tcp_package(conn);
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if (recv_pkg == 0) {
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return 0;
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}
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if (recv_pkg->command != 0xB7) {
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return 0;
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}
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EventStore__Client__Messages__ReadAllEventsCompleted *recv_msg =
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event_store__client__messages__read_all_events_completed__unpack(&conn->protobuf_c_allocator, recv_pkg->data.size, recv_pkg->data.data);
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esc_all_events_slice_t* result = malloc(sizeof(esc_all_events_slice_t));
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result->read_direction = "forward";
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result->is_end_of_stream = (recv_msg->events == 0 || recv_msg->n_events == 0) ? 1 : 0;
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result->from_position.prepare_position = recv_msg->prepare_position;
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result->from_position.commit_position = recv_msg->commit_position;
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result->next_position.prepare_position = recv_msg->next_prepare_position;
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result->next_position.commit_position = recv_msg->next_commit_position;
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result->n_events = recv_msg->n_events;
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result->events = malloc(recv_msg->n_events * sizeof(esc_resolved_event_t*));
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for (size_t i = 0; i < recv_msg->n_events; i++) {
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result->events[i] = resolved_event_create(recv_msg->events[i]);
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}
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return result;
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}
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const char* esc_position_format(const esc_position_t* position, char* buffer, size_t buf_size) {
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snprintf(buffer, buf_size, "%llu/%llu", position->prepare_position, position->commit_position);
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return buffer;
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}
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